An Allen wrench, also known as a hex key, is a small tool used to drive screws and bolts with a hexagonal socket. It has a simple L-shape, making it easy to grip and turn. Allen wrenches are commonly used for assembling furniture, bicycles, and machines, as many screws and bolts are designed with a hexagonal socket. They come in various sizes to fit different fasteners, and their compact design allows for easy storage and use in tight spaces.

What is an "Allen wrench"?

“Allen wrench”的英语定义和含义

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